Compound for forming the bottoms of metal-heating furnaces.



UNITED sTATEs gENT OFFICE.

DAWSON ADERHOLT. OF ROYALTON, PENNSYLVANIA, ASSIGNOR TO MIDDL I OWN OARWORKS, OF MIDDLETOWN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed May 9, 1906. Serial No. 315855- To all wlmm it n'myconcern.-

Be it known that I, DAWSON ADERnoL'r, a citizen of the United States,residing at Royalton, Pennsylvania, have invented a certain new anduseful Improvement in Compounds for Forming the Bottoms of Metal-HeatingFurnaces, of which the following is a full, clear, and exact descrition, such as will enable others skilled in t 1e art to which itappertains to make and use the same.

This invention relates to a new and useful compound for forming thebottoms of rivetheating furnaces and furnaces used in blacksmith-shopsfor welding and other similar purposes.

The compound consists of burnt core-sand, tumbler-sand, and coarse saltmixed to gether in a dry state, the proportions in which theseingredients are mixed together being about as follows: ninety-one ercent. bu-rnt core-sand, six per cent. tumb er-sand, and three per cent.coarse salt. -By burnt core-sand I mean the sand which is used forforming the cores of castings and which is taken from the castings afterthey have been poured. This core-sand 1s a composition consisting of thefollowing ingredients: shar sand or quartz and a small portion ofmolcing-sand with which some clay and a little rosin is mixed. 'lhiscomposition, as is well known, is molded into the desired shape and thendried in an oven to form the completed core. Tumbler-sand consists of amixture of sand and small particles of iron, this mixture being takenfrom beneath the tumblers or rattlers which are used in foundries Iclaim as new, and desire to secure by Let-' ters Patent, is

-1. A compound consisting of burnt coresand, tumbler-sand and coarsesalt thoroughly mixed together; substantially as described.

2. A com ouud consisting of burnt coresand, tumb fer-sand and coarsesalt thoroughly mixed together in a dry state; substantially asdescribed.

3. A com )ound consisting of burnt coresand, tumbler-sand and coarsesalt mixed together in a dry state and in about the proportionsspecified substantially as dcscri wed.

4. A compound consisting of the following ingredients mixed. together ina dry state, coarse salt, sand with which small particles of iron aremixed, and dried sand with which molding-sami, clay and rosin are mixed;substantially as described.

In testimony whereof I hereunto allix my signature, in the presence oftwo witnesses, this 2d day of May, 1906.

DAWSUN ADJCRHOl/l.

Witnesses:

WM. A. CaoLL, A. lVlAnsuALL.

